Dry-cooling apparatus.



R. E. DAVIS.

DRY COOLING APPARATUS.

APPLICATION FILED MAY 3x191].

Patented Feb. 11, 1919.

firm mg Mr/yiwfs/ W ROBERT E. DAVIS, 0F OAK PARK, ILLINOIS.

DRY-COOLING APPARATUS.

Specification of Letters Patent.

' Patented Feb. 11, 1919.

Application filed May 3, 19-17. Serial No. 166,180.

To all whom it may, concern:

Be it known that I, ROBERT E. DAVIS, a citizen of the United'States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Dry-Cooling Apparatus, of which the following is a specification.

This invention relates to improvements in dr -eooling apparatus and more particularly to apparatus adapted primarily for cooling chocolate coated candies. It is a well known fact that chocolates cooled in a moist atmosphere will blur and will lack the essential luster and polish causing a deterioration in the commercial value of the goods. My invention provides means whereby the goods are frost cooled. A further object is to provide a device of this class that, while very efiicient in operation, is cheap to manufacture and requires a minimum of ice. With the foregoing and other objects in view the invention consists in the combination and arrangement of parts to be hereinafter fully described, pointed out in the appended claims and illustrated in the accompanying drawing which forms a part of this specification and in which Figure 1 is a perspective view of my improved apparatus.

Fig. 2 is a vertical sectional. view through the same.

Like reference characters denote corre sponding parts in both views.

My invention comprises a substantially rectangular case having upper and lower compartments 1, 2, the sides of the upper compartment overlapping the sides of the lower compartment and said upper compartment being provided with a removable cover or top 3 which rests upon a strip of felt or similar material 4. The cover 3 is formed upon its under side with a rectangular band of wool or metal 5 adapted to fit snugly inside the walls of the compartment 1 and to rest upon another felt strip 6 which together with the strip 4 forms an air tight fit with the case. A heavy strip of asbestos material 7 is secured to the walls of the compartment 1 and supports the felt strip 6 and rests upon an asbestos wall 8 placed against the walls of the compartment 1 and spaced away from a similar asbestos wall 9 by an air tight filler 10. The asbestos walls 8 and 9 rest upon the walls of the lower compartment 2 and air space 11 is formed between said walls 8, 9 above the lower compartment and below the filler 10.

A metal pan 12 has its lateral upper edges bent for insertion below the strip 7 to rest upon the wall 9 and filler 10 whereby said pan is supported, the lower edges of the said pan resting upon the walls of the lower compartment 2. In the bottom of the pan 12 I place a layer comprising pieces of stone or rock13 upon which a wire screen partition 14 is loosely arranged, a heavy layer of coarse salt being placed upon said screen and a mass of lump ice 15 bein disposed upon the salt bed. An incline drain pipe 16 formed with a trap 17 leads from the salt bed through the walls 9, 8 and through one wall of the compartment 1 and serves to drain oil the Water formed by the melting ice; said trap serving to prevent passage of air through the pipe.

The lower compartment 2 is formed with a plurality of spaced cleats 18 that support the removable trays 19 adapted to carry the chocolates or other goods to be cooled. The compartments 1 and 2 are obviously air tight. The rock 13 being an excellent conductor of heat or cold will direct the cold air against the bottom of the pan 12 and cause a heavy frost to form upon the under surface of the bottom of the pan within the compartment 2. This frost will absorb the moisture from the air within the compartment 2 and so leave a dry cold air within that compartment which will quickly cool chocolates in the trays 19 without loss of the luster, so much desired and without blur.

What is claimed is V 1. In dry cooling apparatus, a case comprising an upper and a lower compartment, the sides of the upper compartment overlapping those of the lower compartment, an air tight cover removably carried by said upper compartment, a walled air compartment formed in said upper compartment, a pan carried by said upper compartment with its rim restin upon the said air compartment and its ottom separating said upper and lower compartments, said pan serving as a container for a refrigerant material, a drain for said pan, and trays removably carried by said lower compartment,

2. In dry cooling apparatus, a case comprising an upper and a lower compartment, the sides of said upper compartment overlapping those of the lower compartment, an

air tight cover removably carried by said upper compartment, a Walled in air compartment formed in said npper compartment, a pan carried by said n'pper'compartment with its rim resting upon the saidair compartment and its bottom separating said npperv and lower compartments, said pan servingas a Container for a refrigerant material and for heat conducting material, a partition Within said pan for separating the refrigerant and heat" conducting materials, a

ROBERT E. DAVIS.

Witnesses:

W. W. MILLER, H. G. CROSE.

Copies 01 this patent may be obtained; (or five cents each, bydaddrelsing the; Commissioner. oz latent.

' Washington, D. 0." 

